Redox topotactic reactions in FeII − III (oxy)hydroxycarbonate new minerals related to fougèrite in gleysols: “trébeurdenite and mössbauerite”

Fougèrite mineral responsible for the bluish-green shade of gleysols in aquifers was identified as Fe II − III oxyhydroxycarbonate, [Fe Fe O 12 H 2(7 − 3 x ) ] 2 +  · [CO · 3H 2 O] 2 −  where the average ferric molar fraction x  = [Fe III /Fe total ] was restricted to the [1/3–2/3] range, up till no...

Full description

Saved in:
Bibliographic Details
Main Authors: Génin, Jean-Marie R., Guérin, O., Herbillon, A. J., Kuzmann, E., Mills, S. J., Morin, G., Ona-Nguema, G., Ruby, C., Upadhyay, C.
Format: Conference Proceeding
Language:English
Subjects:
Atomic
Condensed Matter Physics
Hadrons
Heavy Ions
Molecular
Nuclear Physics
Optical and Plasma Physics
Physics
Physics and Astronomy
Surfaces and Interfaces
Thin Films
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Fougèrite mineral responsible for the bluish-green shade of gleysols in aquifers was identified as Fe II − III oxyhydroxycarbonate, [Fe Fe O 12 H 2(7 − 3 x ) ] 2 +  · [CO · 3H 2 O] 2 −  where the average ferric molar fraction x  = [Fe III /Fe total ] was restricted to the [1/3–2/3] range, up till now. In this paper, Mössbauer spectra of gleys extracted from the schorre of maritime marshes have values of x in the [2/3–1] range. Magnetic properties of homologous chemical compounds studied by Mössbauer spectroscopy are explained with long range order of Fe III ions within Fe cation layers for x  = 1/3, 2/3 and 1. Observed values are mixtures of topotactic domains that are in fact minerals with names proposed to IMA: fougèrite for x  = 1/3, trébeurdenite for x  = 2/3 and mössbauerite for x  = 1.
ISSN:0304-3843
1572-9540
DOI:10.1007/s10751-011-0500-8